GB Standard Q235 Series Galvanized Steel Grating | Custom Size Welded Steel Grating Manufacturer Royal Steel Group
| Item | Steel Grating Specification Details |
| Product Name | Steel Grating |
| Raw Material | Q235, Q235A, Q235B carbon structural steel |
| Applicable Standard | National GB Standard |
| Standard Dimensions | Usable width: 600–1500 mm |
| Bearing bar height/thickness: 25–50 mm | |
| Mesh pitch range: 30–100 mm | |
| Custom Service | Custom overall sizes and grating spacing are available on demand |
| Dimensional Tolerance | Length deviation: ±2 mm |
| Width deviation: ±2 mm | |
| Thickness deviation: ±1 mm | |
| Full Quality Test Items | Spectrometer chemical composition analysis |
| Tensile & hardness mechanical performance test | |
| Flatness inspection | |
| Welding strength detection | |
| Optional Surface Finishes | Hot-dip galvanizing (HDG) |
| Electro-galvanizing | |
| Powder coating & liquid spray painting | |
| Uncoated black raw steel finish | |
| Typical Application Scenarios | Factory walkways & operation platforms |
| Metal stair treads | |
| Drainage trench cover plates | |
| Warehouse & plant access platforms | |
| Vessel decks & outdoor industrial facilities |
| Grating Type | Bearing Bar Pitch / Spacing | Bar Width | Bar Thickness | Cross Bar Pitch | Mesh / Opening Size | Load Capacity |
| Light Duty | 19 mm – 25 mm (3/4"–1") | 19 mm | 3–6 mm | 38–100 mm | 30 × 30 mm | Up to 250 kg/m² |
| Medium Duty | 25 mm – 38 mm (1"–1 1/2") | 19 mm | 3–6 mm | 38–100 mm | 40 × 40 mm | Up to 500 kg/m² |
| Heavy Duty | 38 mm – 50 mm (1 1/2"–2") | 19 mm | 3–6 mm | 38–100 mm | 60 × 60 mm | Up to 1000 kg/m² |
| Extra Heavy Duty | 50 mm – 76 mm (2"–3") | 19 mm | 3–6 mm | 38–100 mm | 76 × 76 mm | >1000 kg/m² |
| Category | Type & Core Parameters | Standard Sizes (mm) | Product Features & Application Scenarios |
| Bearing Bar (Height × Thickness) | Standard Grade | 25×3, 30×3, 32×5 | Suitable for factory walkways, stair treads and routine maintenance platforms |
| Heavy Load Grade | 40×5, 50×5, 60×10 | Designed for parking lots, cargo terminals and large-span industrial zones | |
| Mesh Pitch (Main Bar × Cross Bar) | Series 1 (30mm main bar pitch) | 30 × 50 / 100 | Most widely adopted type; maximum bearing strength, compliant with international industrial standards |
| Series 2 (40mm main bar pitch) | 40 × 50 / 100 | Cost-efficient option, fit for light-load pedestrian paths and protective fencing | |
| Series 3 (60mm main bar pitch) | 60 × 50 / 100 | Ideal for mining sites and large washing workshops, effectively blocking debris buildup | |
| Steel Grade (Q235 Series) | Q235A | No low-temperature impact test required | Applied to indoor general structural parts, offers favorable cost performance |
| Q235B | Passes 20℃ impact resistance test | Preferred standard grade for major projects with superior weldability and impact toughness | |
| Surface Anti-Corrosion Finish | Hot-Dip Galvanized (HDG) | Zinc coating ≥ 610g/m² | Long-term anti-rust service life over 20 years, perfect for outdoor and marine working conditions |
| Black Raw Steel / Paint Coated | Without zinc coating | Matching temporary construction, low-budget projects or dry indoor environments | |
| Surface Shape | Smooth Flat / Serrated Anti-Slip | Flat / Serrated profile | Serrated surface delivers reliable anti-slip performance under oily, wet or icy surroundings |
| Classification | Core Parameter Items | Detailed Explanation |
| 1. Overall Size | Span (L) × Width (W) | Critical note: Buyers must clarify the span direction, which refers to the length direction of load-bearing bars. |
| 2. Structural Specs | Bearing Bar Dimension | Size format: Bar Height × Thickness, examples: 32×5mm, 40×5mm |
| Mesh Pitch | Center-to-center spacing between load-bearing bars and cross rods | |
| 3. Raw Material | Steel Grade Options | Standard Q235B, high-strength Q355B, stainless steel SS304 / SS316 |
| Surface Anti-Corrosion Finish | Hot-dip galvanization (HDG), spray paint, or raw black steel finish | |
| 4. Custom Profile | Surface Type | Smooth plain surface or serrated anti-slip surface |
| Custom Cutting Work | Custom circular holes, notches and cutouts reserved for pipeline penetration | |
| 5. Edge Treatment | Edge Banding & Safety Accessories | Full edge wrapping, kick plates for safety barriers, stair anti-slip nosing |
| 6. Matching Fittings | Fixing Hardware | Saddle clips, G-type clamps and dedicated grating fasteners for installation |
1. Industrial Walkways
It creates secure, steady walking paths for staff inside manufacturing plants and storage warehouses. Its hollow grid structure delivers reliable anti-slip performance; rainwater, industrial fluid and waste residues can flow through the gaps freely, maintaining a tidy, low-risk passage surface.
2. Steel Stair Treads
Perfect for industrial and commercial stair systems that demand long service life and anti-slip properties. Serrated grating or additional anti-slip strips are available as options to further boost on-site safety.
3. Maintenance & Operation Platforms
Commonly arranged in workshop production zones and equipment overhaul areas to bear machinery weight and worker loads. The hollow layout facilitates air circulation and simplifies routine surface cleaning.
4. Drainage Trench Covers
The grid voids offer unobstructed flow for water, oil and various industrial liquids. They are extensively laid on factory ground, outdoor yards and beside drainage ditches to realize smooth, safe liquid drainage.
Royal Steel Group delivers premium custom steel grating products to global clients, covering industrial platform projects in the Middle East and various infrastructure developments throughout the Americas. We maintain local service teams in the US and Guatemala, capable of tackling sophisticated customized structural demands of all kinds. Our gratings feature outstanding load capacity and durable anti-slip properties. Supported by eight regional warehouses at key logistics hubs, we shorten delivery cycles and streamline supply chains to serve large energy and mining construction ventures efficiently.
Packing
Standard Export Packing
Grating panels are bundled securely with steel straps and reinforced to avoid deformation or damage during transit.
Customized Labels & Project Identification
Each bundle can include labels indicating material grade, size specifications, and project codes for efficient handling at the job site.
Additional Protection Available
Wooden pallets, protective covers, and enhanced packaging can be provided for sensitive surface requirements or long-distance shipment.
Delivery
Lead Time
Typically 7–15 days after order confirmation, subject to order quantity and customization.
Flexible Shipping Options
Supports container loading, flatbed transportation, and local delivery arrangements.
Safe Handling & Transport
Packaging is designed for safe lifting, loading/unloading, and efficient installation upon arrival.
Stable cooperation with shipping companies such as MSK, MSC, COSCO efficiently logistics service chain, logistics service chain are we to your satisfaction.
We follow the standards of quality management system ISO9001 in all procedure, and have strict control from packaging material purchase to transport vehicle scheduling.
1. What core benefits does your steel grating offer?
Our grating features great load capacity, superior anti-corrosion performance and long service lifespan at competitive prices, which makes it ideal for industrial and heavy-load construction projects.
2. Can your products comply with US and global industry standards?
Absolutely. We produce grating fully aligned with OSHA safety rules, ANSI/NAAMM guidelines, ASTM A36 base steel standard and ASTM A123 hot-dip galvanizing standard.
3. Where are these steel gratings commonly installed?
Typical scenarios include industrial operation platforms, pedestrian walkways, drainage trench covers, oil & gas facilities, power stations and factory workshops.
4. Is custom sizing available to match project demands?
We provide full customization services: adjustable bearing bar dimensions, grid spacing, overall panel sizes, plate thickness, plus serrated anti-slip surface upon request.
5. What is the expected service lifespan?
Proper hot-dip galvanized grating can serve over 20 years under regular outdoor environments. Actual durability will vary based on local climate and corrosive exposure levels.
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